class_docstr: Main class for calculating GageRnR.
docstr: Calculate GageRnR Standard Deviations.
docstr_tok: ["Calculate","GageRnR","Standard","Deviations","."]
code: def calculate_std(self, Var):
      """Calculate GageRnR Standard Deviations."""
      Std = dict()
      for key in Var:
          Std[key] = math.sqrt(Var[key])
  
      return Std
  
imports: from enum import Enum
  import numpy
  import math
  import scipy.stats
label_desc: Use image node_id 9 for calling the GageRnR obj's underlying member method code with example usage: obj.calculate_std(Var) and returns: Std